Related Party Transactions (Affiliated Asset Transfers) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2016 USD ($)
Prudential Insurance March 15 Purchase
Related Party [Line Items]
Fair Value	$ 92
Book Value	74
APIC, Net of Tax Increase/(Decrease)	(12)
Realized Investment Gain/(Loss), Net	0
Derivative Gain/(Loss)	0
Prudential Insurance June 15 Purchase
Related Party [Line Items]
Fair Value	11
Book Value	10
APIC, Net of Tax Increase/(Decrease)	(1)
Realized Investment Gain/(Loss), Net	0
Derivative Gain/(Loss)	0
Prudential Insurance March 16 Sale
Related Party [Line Items]
Fair Value	89
Book Value	89
APIC, Net of Tax Increase/(Decrease)	(1)
Realized Investment Gain/(Loss), Net	0
Derivative Gain/(Loss)	$ 0